<template>
  <div class="login-page">
    <el-card class="box-card">
      <div slot="header" class="clearfix">
        <span class="login-title">图书借阅后台管理系统</span>
      </div>
      <div class="login-form">
        <el-form :model="form" :rules="loginRules" ref="loginForm">
          <el-form-item prop="userName">
            <el-input type="text" v-model="form.userName" auto-complete="off" placeholder="请输入用户名">
              <template slot="prepend"><i style="font-size:20px" class="el-icon-user"></i></template>
            </el-input>
          </el-form-item>
          <el-form-item prop="passWord">
            <el-input type="text" v-model="form.passWord" auto-complete="off" placeholder="请输入密码">
              <template slot="prepend"><i style="font-size:20px" class="el-icon-key"></i></template>
            </el-input>
          </el-form-item>
          <el-form-item>
            <el-button style="width:100%;" type="primary" @click="handleLogin" :loading="loading">登录</el-button>
          </el-form-item>
        </el-form>
      </div>
    </el-card>
  </div>
</template>

<script>
  export default {
    computed: {
    key() {
      return this.$store.state.key;
    }
  },
    name: 'Login',
    data(){
      return {
        loading: false,
        form:{
          userName: '',
          passWord: ''
        },
        loginRules:{
          userName: [
          { required: true, message: '请输入账户', trigger: 'blur' },
          ],
          passWord: [
          { required: true, message: '请输入密码', trigger: 'blur'}
          ]
        }
      }
    },
    methods:{
      handleLogin(){
        this.$store.state.key=true;
        this.$refs.loginForm.validate().then(()=>{
          this.loading = true;

          //模拟异步请求后台接口 登录操作
          setTimeout(()=>{
            this.$router.push('/home');
            this.key=true;
            this.loading = false;
          }, 1000)
        }).catch((error=>{
          this.$message({
          message: '输入错误！',
          type: 'warning'
          });
        }))
      }
    }
  }
</script>

<style scoped>
  .login-page{
    background-image: linear-gradient(180deg, #2af598 0%, #009efd 100%);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .login-title{
    font-size: 20px;
  }

  .box-card {
    width: 375px;
  }

</style>
